Outer wall of buildings



(No Mode-l.)

' 0. O. GILMAN.

OUTER WALL-0F BUILDINGS. No. 338,514. Patented Mar. 23, 1886.

NITED STATES PATENT OFFICE.

CHARLES CARROLL GILMAN, OF ELDORA, IOWA.

OUTER WALL OF BUILDINGS.

SPECIFICATION forming part of Letters Patent No. 338,514, dated March23, 1886.

Application filed August 4, 1885. Serial No. 173,517.

To (ZZZ whom it may concern:

Be it known that I, CHARLES CARROLL GIL- MAN, a citizen of the UnitedStates, residing at Eldora, Hardin county, Iowa, have invented a new anduseful Improvement in Outer Walls of Buildings, (Case D of which thefollowing is a specification.

The object of my invention is to prevent the penetration of externalheat and cold through the outer brick walls of a building; and to thisend my invention consists in securing to the inside surface of anordinary brick wall fluted slabs or sheets of terra-cotta lumber or asimilar porous burned-brick material, as hereinafter described andclaimed.

The accompanying drawing represents a vertical transverse section of awall constructed in accordance with my invention. The bricks A, formingthe body of the wall, are laid up in the ordinary well-known manner. Abrick wall of average thickness does not prevent, however, thepenetration of external heat and cold, because bricks are goodconductors of heat and cold.

To overcome this objection is the object of my invention, and I attainthis object by securing to the inside surface of the brick wall a layerof terra-cotta lumber or its equivalent.

Terra-cotta lumber, as is well known, is to a very high degree anon-conductor of heat and cold, said property being due largely to itsporous character or structure, formed by the combustion of sawdustmingled with the clay in its manufacture. It is also a non-combustiblematerial which more effectually resists the action of fire than brick,is easily sawed or wrought with edged toolssuch as used by carpenters-and will receive and hold nails or spikes.

(N0 model.)

I do not desire to limit myself strictly to 0 terracotta lumber, socalled, as any porous burned -brick material possessing substantiallythe same properties is within the scope of my invention. The slabs orsheets B, ofterra-cotta lumber, are preferably twelve inches square, ormore, and two inches thick. They are laid against the inside surface ofthe brick wall, and secured to the same by nails or spikes G, passingthrough said slabs into the mortar joints between said bricks. I flutethe sheets, as shown at D, and place said fluted side against the brickwall, so as to form a series of dead-air spaces, which will aid inpreventing the penetration of external heat and cold. The exposedsurface of the slabs of terracotta lumber is covered with a coating ofplaster, E, which firmly adheres thereto, by reason of the porousstructure thereof, and which coating may be thinner than that necessarywhere laths are used.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, 1s

The combination, with the outer brick wall of a building, of flutedsheets of terra-cotta lumber or its equivalent, secured with the flutedside against the bricks to the inside surface of said wall, so as toform a series of dead air spaces, substantially as described.

In testimony whereof Ihave signed my name 70 in the presence of twowitnesses.

CHARLES CARROLL GILMAN.

Vitnesses:

EDMUND RICE, R. B. GALUSHA.

